Colombo Weather in May

Colombo in May averages 31°C (88°F) during the day and 26°C (79°F) at night. May is part of the rainy season, so frequent rainfall is typical.

Rainfall in Colombo in May

As part of the rainy season, Colombo sees around 14 days of rain in May, with an average of 294 mm (12 in). Showers during the rainy season tend to be heavy and can come down intensely. An umbrella is often not enough, so a poncho or waterproof jacket is a better choice.

Temperature in Colombo in May

If you're visiting Colombo in May, expect highs of 31°C (88°F) and overnight lows around 26°C (79°F). It's usually most comfortable outside during the morning and later in the day. Nights are warm at 26°C (79°F), which can make sleeping uncomfortable. Keeping windows open or using a fan can help. A cold shower before bed is also a good way to cool down.

Sunshine in Colombo in May

There are approximately 202 hours of sunshine this month, despite being the rainy season. Rain often arrives in the late afternoon or evening, keeping mornings and early afternoons sunny. Even during the wet season, it could still be a nice time to visit.

Wind Speed in Colombo in May

May sees wind speeds averaging 2 m/s (4 knots). You'll typically experience pleasant light breezes that move leaves slightly and feel refreshing. As an average, expect variation from very calm days to periods with more apparent air movement.

Average water temperature in May

The water is 28°C (82°F) this month, warm enough that getting in requires no effort at all. Good conditions for swimming, snorkeling, or just floating around.

Our weather planner can help you find worldwide destinations with pleasant weather during this period. January typically offers the best weather for Colombo.